It says "carbon fibre and PEEK" in the description. I thought the SXK clone was carbon fibre doors on a POM/delrin body. Can you confirm either way DP?
I'm far from the best person to ask there, Pigs. The stock door (laying flat) is definitely different (posting a pic at the bottom of this message), but other than that, everything looks very similar to me. I can feel (and slightly see) differences in the machining and quality, but at 1/3 of the price, I'd have been stunned otherwise.
I like mine too. Overall build quality is excellent.
The only niggle I have with the PRC Ionbox is the width (don't have large hands). For that shape I prefer thumb fire/side button like the BB. Even better with a rocker switch.
The button for me is a difference maker, along with the weight. The ION isn't a "carry piece" for me, but neither is a BB Rev 4. I have other things that work better for my preferences (BB Rev3s, Unions and TEK Endurance SBSs, etc.). The Kim AIO is now in the "carry" group too. It's even a bit smaller & lighter than the Rev3, which matters to me.
A well hidden USB-C port under the magnetic switch panel.
LMAO! Absolutely ZERO chance I'd have EVER discovered that!!! Besides, I prefer to swap batteries vs. USB. I never use the software either, for any mods.
I push thee button and thee vapor comes out.

A very simpleton vaper, I (aye).